A bicycle can be used to generate electric power by attaching a loop to the axle and letting it rotate in a magnetic field. Suppose such a device is attached to a bicycle with a 62 cm diameter wheel.

A) What is the maximum emf of the generator when the bicycle moves at 3.5 m/s, noting that it was 18 V under the original conditions?

B) If the sophisticated generator can vary its own magnetic field, what field strength will it need at 10.00 m/s to produce a 9.00 V maximum emf? Assume the coil has 1.00 by 3.00 cm rectangular coil with 100 turns.